Cavitation erosion of WC-Co

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dc.contributor.advisorBall, Anthonyen_ZA
dc.contributor.authorHankey, S Een_ZA
dc.date.accessioned2016-08-05T10:49:21Z
dc.date.available2016-08-05T10:49:21Z
dc.date.issued1987en_ZA
dc.descriptionBibliography: pages 68-70.en_ZA
dc.description.abstractAn investigation involving the vibratory cavitation erosion of WC-Co alloys was undertaken in order to determine the mechanisms of material removal. Nineteen grades of WC-Co alloys were studied. These alloys had been previously characterised according to microstructural and mechanical properties. Further characterisation by way of Young's modulus and density of the materials was undertaken. An investigation of the i nfluence of various parameters on cavitation erosion established a binder content dependence on erosion. For two grain sizes, erosion was found to increase to a maximum at 12 vo1-% binder content (1.8 μm grain size) and 23 vol-% binder (2.8 μm grain size). The main mode of material removal was found to be cobalt removal followed by WC grain pull-out. In high binder content alloys, cobalt removal was predominant with little loss of WC grains. X-ray diffraction showed that the allotropic phase transformation of the binder under cavitational attack was beneficial to the erosion resistance of these alloys. The erosion of low binder content alloys was controlled by the contiguity of the WC skeleton. Maximum erosion occurred at binder contents which corresponded to the combination of a fragile WC skeleton and a small volume of available cobalt for strain induced transformation.en_ZA
dc.identifier.apacitationHankey, S. E. (1987). <i>Cavitation erosion of WC-Co</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/21135en_ZA
dc.identifier.chicagocitationHankey, S E. <i>"Cavitation erosion of WC-Co."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1987. http://hdl.handle.net/11427/21135en_ZA
dc.identifier.citationHankey, S. 1987. Cavitation erosion of WC-Co. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Hankey, S E AB - An investigation involving the vibratory cavitation erosion of WC-Co alloys was undertaken in order to determine the mechanisms of material removal. Nineteen grades of WC-Co alloys were studied. These alloys had been previously characterised according to microstructural and mechanical properties. Further characterisation by way of Young's modulus and density of the materials was undertaken. An investigation of the i nfluence of various parameters on cavitation erosion established a binder content dependence on erosion. For two grain sizes, erosion was found to increase to a maximum at 12 vo1-% binder content (1.8 μm grain size) and 23 vol-% binder (2.8 μm grain size). The main mode of material removal was found to be cobalt removal followed by WC grain pull-out. In high binder content alloys, cobalt removal was predominant with little loss of WC grains. X-ray diffraction showed that the allotropic phase transformation of the binder under cavitational attack was beneficial to the erosion resistance of these alloys. The erosion of low binder content alloys was controlled by the contiguity of the WC skeleton. Maximum erosion occurred at binder contents which corresponded to the combination of a fragile WC skeleton and a small volume of available cobalt for strain induced transformation. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - Cavitation erosion of WC-Co TI - Cavitation erosion of WC-Co UR - http://hdl.handle.net/11427/21135 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21135
dc.identifier.vancouvercitationHankey SE. Cavitation erosion of WC-Co. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21135en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCavitationen_ZA
dc.subject.otherTungsten-cobalt alloys - Metallurgyen_ZA
dc.subject.otherMaterials Scienceen_ZA
dc.titleCavitation erosion of WC-Coen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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